Grimsvotn

Volcano number:373010
Region:Iceland and Arctic Ocean
Country:Iceland
Geodetic measurements?Yes
Deformation observation?Yes
Measurement method(s):GPS - campaign
Duration of observation: Before 1998, 2004
Inferred cause of deformation:Magmatic
Characteristics of deformation:

GPS measurements showed ~2cm uplift before the 1998 eruption and subsidence after and then again uplift in September 2004. The volcano increased in it’s seismic activity  after 2003. The last eruption occurred after a swarm on November 1st 2003. (Sturkell et al., 2006)

Reference:Sturkell, E., Sigmundsson, F., & Einarsson, P. (2003). Recent unrest and magma movements at Eyjafjallajökull and Katla volcanoes, Iceland. Journal of Geophysical Research: Solid Earth, 108(B8).
Reference:Sturkell, E., Einarsson, P., Sigmundsson, F., Geirsson, H., Olafsson, H., Pedersen, R., & Stefánsson, R. (2006). Volcano geodesy and magma dynamics in Iceland. Journal of Volcanology and Geothermal Research, 150(1), 14-34.
Location:-17.316, 64.416